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Effect of Monosaccharides Including Rare Sugars on the Bilayer Phase Behavior of Dimyristoylphosphatidylcholine.
Membranes (Basel)
December 2024
Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan.
We observed bilayer phase transitions of dimyristoylphosphatidylcholine (DMPC) in aqueous solutions of four kinds of monosaccharides, namely, D-glucose, D-fructose, D-allose and D-psicose, using differential scanning calorimetry (DSC). D-allose (C3-epimer of D-glucose) and D-psicose (C3-epimer of D-fructose) are rare sugars. We performed DSC measurements using two types of sugar-containing sample dispersions of the DMPC vesicles: one is a normal sample dispersion with no concentration asymmetry between the inside and outside of the vesicles and the other is an unusual sample dispersion with a concentration asymmetry.
View Article and Find Full Text PDFSEASONAL VARIATION OF BLOOD ANALYTES ASSOCIATED WITH SKIN HEALTH IN ALASKAN ICE SEALS.
J Zoo Wildl Med
December 2024
Alaska SeaLife Center, Seward, AK 99664.
Recent unusual mortality events involving skin pathology in bearded (), ringed (), and spotted seals () in Alaska highlight the potential sensitivity of ice-associated species to the complex effects of climate change. The regulation of thyroid hormones, cortisol, and vitamin A have been shown to play essential roles in skin health and seasonal molt in some pinnipeds. Unfortunately, the lack of available reference data for healthy Alaskan ice seals has prevented the adequate evaluation of these factors in cases associated with mortality events.
View Article and Find Full Text PDFDoes the unusual phenomenon of sustained force circumvent the speed-endurance trade off in the jaw muscle of the southern alligator lizard (Elgaria multicarinata)?
J Exp Biol
December 2024
Evolution, Ecology, and Organismal Biology Department, University of California, Riverside, CA 92521, USA.
The jaw muscles of the southern alligator lizard, Elgaria multicarinata, are used in prolonged mate-holding behavior, and also to catch fast prey. In both males and females, these muscles exhibit an unusual type of high endurance known as sustained force in which contractile force does not return to baseline between subsequent contractions. This phenomenon is assumed to facilitate the prolonged mate-holding observed in this species.
View Article and Find Full Text PDFShadows in the forest: Uncovering unusual colouration records in mammals from the Ecuadorian Tropical Andes.
Biodivers Data J
November 2024
CIBIO Centro de Investigación em Biodiversidade e Recursos Genéticos, Porto, Portugal CIBIO Centro de Investigación em Biodiversidade e Recursos Genéticos Porto Portugal.
Variations in colouration patterns have been reported in numerous wildlife species, particularly birds. However, the increased use of camera traps for wildlife monitoring has enabled the detection of elusive species and phenotypic variations that might otherwise go undetected. Here, we compiled records of unusual colouration patterns in terrestrial mammals, documented through camera-trap studies over a 12-year period in the Llanganates-Sangay Connectivity Corridor, in the Tropical Andes of Ecuador.
View Article and Find Full Text PDFLineage-dependent partitioning of activities in chemoclines defines Woesearchaeota ecotypes in an extreme aquatic ecosystem.
Microbiome
November 2024
UMR5240 Microbiologie Adaptation Et Pathogénie, Université, INSA Lyon, CNRS, Claude Bernard Lyon 1, Villeurbanne, 69621, France.
Article Synopsis
- The study explores the diversity and ecological roles of Woesearchaeota in Lake Dziani Dzaha, revealing their unique genomic features and lifestyles.
- Researchers identified two distinct populations of Woesearchaeota with a bimodal distribution in depth, linked to different chemical environments, indicating their complex interactions within the microbial community.
- The findings challenge existing beliefs about the metabolic dependencies of Woesearchaeota, suggesting they exhibit adaptive lifestyles that contribute significantly to ecosystem dynamics.
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